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Rev 1339 Rev 1340
Line 94... Line 94...
94 
static void line_free(struct line far *ptr) {
 94 
static void line_free(struct line far *ptr) {
95 
  _dos_freemem(FP_SEG(ptr));
 95 
  _dos_freemem(FP_SEG(ptr));
96 
}
 96 
}
97 
 
 97 
 
98 
 
 98 
 
99 
static struct line far *line_resize(struct line far *ptr, unsigned short newsiz) {
 99 
static signed char curline_resize(struct file far *db, unsigned short newsiz) {
100 
  unsigned int maxavail;
 100 
  unsigned int maxavail;
101 
  struct line far *newptr;
 101 
  struct line far *newptr;
102 
 
 102 
 
103 
  /* try resizing the block (faster) */
 103 
  /* try resizing the block (faster) */
104 
  if (_dos_setblock((sizeof(struct line) + newsiz) / 16 + 1, FP_SEG(ptr), &maxavail) == 0) return(ptr);
 104 
  if (_dos_setblock((sizeof(struct line) + newsiz) / 16 + 1, FP_SEG(db->cursor), &maxavail) == 0) return(0);
105 
 
 105 
 
106 
  /* create a new block and copy data over */
 106 
  /* create a new block and copy data over */
107 
  newptr = line_calloc(newsiz);
 107 
  newptr = line_calloc(newsiz);
108 
  if (newptr == NULL) return(NULL);
 108 
  if (newptr == NULL) return(-1);
109 
  _fmemmove(newptr, ptr, sizeof(struct line) + ptr->len);
 109 
  _fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);
- 
 
 110 
 
- 
 
 111 
  /* rewire the linked list */
- 
 
 112 
  db->cursor = newptr;
- 
 
 113 
  if (newptr->next) newptr->next->prev = newptr;
- 
 
 114 
  if (newptr->prev) newptr->prev->next = newptr;
- 
 
 115 
 
110 
  return(newptr);
 116 
  return(0);
111 
}
 117 
}
112 
 
 118 
 
113 
 
 119 
 
114 
/* adds a new line at cursor position into file linked list and advance cursor
120 
/* adds a new line at cursor position into file linked list and advance cursor
115 
 * returns non-zero on error */
 121 
 * returns non-zero on error */
Line 175... Line 181...
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}
 181 
}
176 
 
 182 
 
177 
 
 183 
 
178 
/* append a nul-terminated string to line at cursor position */
 184 
/* append a nul-terminated string to line at cursor position */
179 
static int line_append(struct file *f, const char far *buf, unsigned short len) {
 185 
static int line_append(struct file *f, const char far *buf, unsigned short len) {
180 
  struct line far *n;
 - 
 
181 
  if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */
 186 
  if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */
182 
  n = line_resize(f->cursor, f->cursor->len + len);
 187 
  if (curline_resize(f, f->cursor->len + len) != 0) return(-1);
183 
  if (n == NULL) return(-1);
 - 
 
184 
  f->cursor = n;
 - 
 
185 
  _fmemmove(f->cursor->payload + f->cursor->len, buf, len);
 188 
  _fmemmove(f->cursor->payload + f->cursor->len, buf, len);
186 
  f->cursor->len += len;
 189 
  f->cursor->len += len;
187 
 
 190 
 
188 
  /* rewire the linked list */
 - 
 
189 
  if (f->cursor->next) f->cursor->next->prev = f->cursor;
 - 
 
190 
  if (f->cursor->prev) f->cursor->prev->next = f->cursor;
 - 
 
191 
 
 - 
 
192 
  return(0);
 191 
  return(0);
193 
}
 192 
}
194 
 
 193 
 
195 
 
 194 
 
196 
static void db_rewind(struct file *db) {
 195 
static void db_rewind(struct file *db) {
Line 453... Line 452...
453 
    uidirty.to = db->cursorposy;
 452 
    uidirty.to = db->cursorposy;
454 
    db->modflag = 1;
 453 
    db->modflag = 1;
455 
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
 454 
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
456 
    struct line far *nextline = db->cursor->next;
 455 
    struct line far *nextline = db->cursor->next;
457 
    if (db->cursor->next->len > 0) {
 456 
    if (db->cursor->next->len > 0) {
458 
      void far *newptr = line_resize(db->cursor, db->cursor->len + db->cursor->next->len + 1);
 457 
      if (curline_resize(db, db->cursor->len + db->cursor->next->len + 1) == 0) {
459 
      if (newptr != NULL) {
 - 
 
460 
        db->cursor = newptr;
 - 
 
461 
        _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
 458 
        _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
462 
        db->cursor->len += db->cursor->next->len;
 459 
        db->cursor->len += db->cursor->next->len;
463 
      }
 460 
      }
464 
    }
 461 
    }
- 
 
 462 
 
465 
    db->cursor->next = db->cursor->next->next;
 463 
    db->cursor->next = db->cursor->next->next;
466 
    db->cursor->next->prev = db->cursor;
 464 
    db->cursor->next->prev = db->cursor;
467 
    if (db->cursor->prev != NULL) db->cursor->prev->next = db->cursor; /* in case realloc changed my pointer */
 - 
 
- 
 
 465 
 
468 
    line_free(nextline);
 466 
    line_free(nextline);
469 
    uidirty.from = db->cursorposy;
 467 
    uidirty.from = db->cursorposy;
470 
    uidirty.to = 0xff;
 468 
    uidirty.to = 0xff;
471 
    db->totlines -= 1;
 469 
    db->totlines -= 1;
472 
    db->modflag = 1;
 470 
    db->modflag = 1;
Line 658... Line 656...
658 
  return(errflag);
 656 
  return(errflag);
659 
}
 657 
}
660 
 
 658 
 
661 
 
 659 
 
662 
static void insert_in_line(struct file *db, const char *databuf, unsigned short len) {
 660 
static void insert_in_line(struct file *db, const char *databuf, unsigned short len) {
663 
  struct line far *n;
 - 
 
664 
  n = line_resize(db->cursor, db->cursor->len + len);
 661 
  if (curline_resize(db, db->cursor->len + len) == 0) {
665 
  if (n != NULL) {
 - 
 
666 
    unsigned short off = db->xoffset + db->cursorposx;
 662 
    unsigned short off = db->xoffset + db->cursorposx;
667 
    db->modflag = 1;
 663 
    db->modflag = 1;
668 
    if (n->prev) n->prev->next = n;
 - 
 
669 
    if (n->next) n->next->prev = n;
 - 
 
670 
    db->cursor = n;
 - 
 
671 
    _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1);
 664 
    _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1);
672 
    db->cursor->len += len;
 665 
    db->cursor->len += len;
673 
    uidirty.from = db->cursorposy;
 666 
    uidirty.from = db->cursorposy;
674 
    uidirty.to = db->cursorposy;
 667 
    uidirty.to = db->cursorposy;
675 
    while (len--) {
 668 
    while (len--) {